Home / 12,986.60-19,499.10-9,108.20

Finding the Fourth Proportional to 12,986.60, 19,499.10 and 9,108.20

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Solution

The fourth proportional to 12,986.60, 19,499.10 and 9,108.20 is: 13,675.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.60 : 19,499.10 = 9,108.20 : x
  2. Step 2: Convert to fraction form
    12,986.60/19,499.10 = 9,108.20/x
  3. Step 3: Cross multiply
    12,986.60x = 19,499.10 × 9,108.20
  4. Step 4: Simplify right side
    12,986.60x = 177,601,702.62
  5. Step 5: Solve for x
    x = 177,601,702.62/12,986.60
  6. Step 6: Final answer
    x = 13,675.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.